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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">medsovet</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинский Совет</journal-title><trans-title-group xml:lang="en"><trans-title>Meditsinskiy sovet = Medical Council</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-701X</issn><issn pub-type="epub">2658-5790</issn><publisher><publisher-name>REMEDIUM GROUP Ltd.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21518/2079-701X-2020-3-144-150</article-id><article-id custom-type="elpub" pub-id-type="custom">medsovet-5583</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Практика</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Practice</subject></subj-group></article-categories><title-group><article-title>Предикторы невынашивания при многоплодной беременности</article-title><trans-title-group xml:lang="en"><trans-title>The predictors of preterm labour in patients with multiple pregnancy</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0357-7097</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баринов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Barinov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баринов Сергей Владимирович, доктор медицинских наук, профессор, заведующий кафедрой акушерства и гинекологии №2</p><p>644043, Омск, ул. Ленина, д. 12 </p></bio><bio xml:lang="en"><p>Sergei V. Barinov, Dr. of Sci. (Med), Professor, Head of the Department of Obstetrics and Gynecology № 2</p><p>12, Lenin St., Omsk, 644043</p></bio><email xlink:type="simple">barinov_omsk@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1038-3661</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белинина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Belinina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Белинина Антонина Анатольевна, кандидат медицинских наук, заместитель главного врача</p><p>656045, Барнаул, ул. Фомина, д. 154 </p></bio><bio xml:lang="en"><p>Antonina A. Belinina, Cand. of Sci. (Med), Deputy Chief Medical Officer</p><p>154, Fomina St., Barnaul, 656045</p></bio><email xlink:type="simple">antonina_belinina@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5812-4925</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колядо</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Koliado</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колядо Ольга Викторовна, заведующая отделением</p><p>656045, Барнаул, ул. Фомина, д. 154 </p></bio><bio xml:lang="en"><p>Olga V. Koliado, Head of Department</p><p>154, Fomina St., Barnaul, 656045</p></bio><email xlink:type="simple">kolyado.ov@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0741-8974</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Молчанова</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Molchanova</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Молчанова Ирина Владимировна, кандидат медицинских наук, главный врач</p><p>656045, Барнаул, ул. Фомина, д. 154 </p></bio><bio xml:lang="en"><p>Irina V. Molchanova, Cand. of Sci. (Med), Chief Medical Officer</p><p>154, Fomina St., Barnaul, 656045</p></bio><email xlink:type="simple">molcanova2008@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шкрет</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shkret</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шкрет Алина Александровна, врач акушер-гинеколог</p><p>656045, Барнаул, ул. Фомина, д. 154 </p></bio><bio xml:lang="en"><p>Alina A. Shkret, obstetrician-gynecologist</p><p>154, Fomina St., Barnaul, 656045</p></bio><email xlink:type="simple">lina.sherman@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0741-3337</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Степанов</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanov</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Cтепанов Сергей Степанович, доктор медицинских наук, старший лаборант кафедры гистологии</p><p>644043, Омск, ул. Ленина, д. 12 </p></bio><bio xml:lang="en"><p>Sergei S. Stepanov, Dr. of Sci. (Med), Senior Lab Technician of the Department of Histology</p><p>12, Lenin St., Omsk, 644043</p></bio><email xlink:type="simple">serg_stepanov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Омский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Omsk State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Алтайский краевой клинический перинатальный центр</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Altai Regional Clinical Perinatal Centre</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>17</day><month>04</month><year>2020</year></pub-date><volume>0</volume><issue>3</issue><fpage>144</fpage><lpage>150</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Баринов С.В., Белинина А.А., Колядо О.В., Молчанова И.В., Шкрет А.А., Степанов С.С., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Баринов С.В., Белинина А.А., Колядо О.В., Молчанова И.В., Шкрет А.А., Степанов С.С.</copyright-holder><copyright-holder xml:lang="en">Barinov S.V., Belinina A.A., Koliado O.V., Molchanova I.V., Shkret A.A., Stepanov S.S.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.med-sovet.pro/jour/article/view/5583">https://www.med-sovet.pro/jour/article/view/5583</self-uri><abstract><sec><title>Введение</title><p>Введение. Число женщин с многоплодием растет повсеместно, особенно в странах с высоким уровнем оказания медицинской помощи, где активно используются вспомогательные репродуктивные технологии. По данным зарубежных исследований, одна треть рождающихся двоен – результат вспомогательных репродуктивных технологий (ВРТ), в связи с чем в будущем можно прогнозировать лишь рост многоплодия. Основная акушерская проблема данных беременностей – это проблема вынашивания.</p></sec><sec><title>Цель исследования</title><p>Цель исследования: Определение предикторов невынашивания при многоплодной беременности для разработки профилактических мероприятий по развитию ранних преждевременных родов у данной группы пациенток.</p></sec><sec><title>Материал и методы</title><p>Материал и методы: Проведено ретроспективное контролируемое обсервационное исследование, включающее в себя 154 пациентки с многоплодной беременностью, которые были родоразрешены в Алтайском краевом клиническом перинатальном центре. Для определения предикторов невынашивания был применен логистический анализ.</p></sec><sec><title>Результаты</title><p>Результаты: Проведенное исследование показало, что предикторы отличаются по триместрам своим составом и силой. На основе выявленных предикторов составлены модели прогноза преждевременных родов с высоким уровнем корректного предсказания для каждого триместра гестации. Большинство выявленных нами предикторов носят неуправляемый анамнестический характер, но выявление данных предикторов крайне важно для формирования беременных высокой группы риска преждевременных родов и дальнейшего особого медицинского сопровождения. Профилактировать преждевременные роды необходимо начинать с прегравидарного этапа: планирование беременности возможно только после лечения хронического эндометрита, с последующим контролем микрофлоры влагалища и гестагенной поддержкой. С небольшой долей вероятности можно говорить о предотвращении ИЦН, однако своевременная ее коррекция является важным фактором улучшения перинатального исхода. Наложение акушерского пессария у беременных c многоплодием и ИЦН позволило пролонгировать гестационный срок на 7 недель.</p></sec><sec><title>Заключение</title><p>Заключение: комплексный подход ведения беременных c многоплодием на основе применения прогностических шкал невынашивания позволяет снизить число ранних преждевременных родов.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. The number of women with multiple pregnancy is increasing worldwide, especially in countries with a high level of health care, where assisted reproductive technologies are widely used. According to foreign studies, one third of twins are born as a result of Assisted Reproductive Technologies (ART), so only an increase in multiple pregnancy can be predicted in the future. The main obstetric problem with these pregnancies is the problem of carrying.</p></sec><sec><title>Objective</title><p>Objective: To identify the predictors of preterm birth in patients with multiple pregnancy in order to improve monitoring and prophylactic measures among this cohort of women.</p></sec><sec><title>Material and methods</title><p>Material and methods: A retrospective controlled observational study, including 154 patients with multiple pregnancies was carried out. Logistic analysis was used to identify the predictors of preterm labour.</p></sec><sec><title>Results</title><p>Results: The study showed that the predictors of preterm birth varied from one trimester to another. Based on the identified predictors, the predictive models for each trimester of pregnancy were compiled. Most of the identified predictors are related to obstetrical history. Risk groups formation, based on the identification of these predictors, is extremely important for qualified medical support. Prophylactic measures should be performed on the pre-conceptional stage. Pregnancy planning should be recommended only after treatment of chronic endometritis, followed by control of vaginal microflora and progesterone support. It is hardly possible to talk about the prevention of cervical insufficiency. However, cervical correction is an important factor for perinatal outcomes improving. The research suggests that the insertion of cervical pessary in women with multiple pregnancy and cervical insufficiency allows to prolong the gestational period for 7 weeks.</p></sec><sec><title>Conclusion</title><p>Conclusion: a comprehensive approach of management of women with multiple pregnancy based on the prognostic scales of preterm labour, allows to reduce the preterm birth rate.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>акушерский пессарий</kwd><kwd>истмико-цервикальная недостаточность</kwd><kwd>невынашивание</kwd><kwd>предикторы</kwd><kwd>многоплодная беременность</kwd><kwd>преждевременные роды</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cervical insufficiency</kwd><kwd>miscarriage</kwd><kwd>multiple pregnancy</kwd><kwd>predictors</kwd><kwd>premature birth</kwd><kwd>pessary</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Сичинава Л.Г. Многоплодие. Современные подходы к тактике ведения беременности. Акушерство, гинекология и репродукция. 2014;8(2):131– 138. Avaiable at: https://www.gynecology.su/jour/article/view/78.</mixed-citation><mixed-citation xml:lang="en">Sichinava L.G. Current approaches to management of multiple pregnancies. Akusherstvo, ginekologiya i reproduktsiya = Obstetrics, Gynecology and Reproduction. 2014;8(2):131–138. (In Russ.) (In Russ.) Avaiable at: https://www.gynecology.su/jour/article/view/78.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Ananth C.V., Chauhan S.P. Epidemiology of twinning in developed countries. Semin Perinatol. 2012;36(3):156–161. doi: 10.1055/s-0038-1668117.</mixed-citation><mixed-citation xml:lang="en">Ananth C.V., Chauhan S.P. Epidemiology of twinning in developed countries. Semin Perinatol. 2012;36(3):156–161. doi: 10.1055/s-0038-1668117.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Kulkarni A.D., Jamieson D.J., Jones H.W. Jr et al. Fertility treatments and multiple births in the United States. N Engl J Med. 2013;369(23):2218– 2225. doi: 10.1056/NEJMoa1301467.</mixed-citation><mixed-citation xml:lang="en">Kulkarni A.D., Jamieson D.J., Jones H.W. Jr et al. Fertility treatments and multiple births in the United States. N Engl J Med. 2013;369(23):2218– 2225. doi: 10.1056/NEJMoa1301467.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Hamilton В.Е., Martin J.A., Osterman M.J., Curtin S.C., Matthews T.J. Births Final data for 2014. Natl Vital Stat Rep. 2015;64(12):1–64. Avaiable at: https://www.ncbi.nlm.nih.gov/pubmed/26727629.</mixed-citation><mixed-citation xml:lang="en">Hamilton В.Е., Martin J.A., Osterman M.J., Curtin S.C., Matthews T.J. Births Final data for 2014. Natl Vital Stat Rep. 2015;64(12):1–64. Avaiable at: https://www.ncbi.nlm.nih.gov/pubmed/26727629.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Misra D.P., Ananth C.V. Infant mortality among singletons and twins in the United States during 2 decades: effects of maternal age. Pediatrics. 2002;110(6):1163–1168. doi: 10.1007%2Fs13524-012-0132-x.</mixed-citation><mixed-citation xml:lang="en">Misra D.P., Ananth C.V. Infant mortality among singletons and twins in the United States during 2 decades: effects of maternal age. Pediatrics. 2002;110(6):1163–1168. doi: 10.1007%2Fs13524-012-0132-x.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Баринов С.В., Рогова Е.В., Долгих Т.И., Кадцына Т.В. Особенности течения многоплодной беременности в сочетании с тромбофилиями. Мать и дитя в Кузбассе. 2014;(2):39–42. Режим доступа: http://mednauki.ru/index.php/MD/issue/viewIssue/55/54.</mixed-citation><mixed-citation xml:lang="en">Barinov S.V., Rogova E.V., Dolgich T.I., Kadtcina T.V. Features of o course of polycarpous pregnancy in combination with trombophylia. Mat’ i ditya v Kuzbasse = Mother and Child on Kuzbass. 2014;(2):39–42. (In Russ.) Avaiable at: http://mednauki.ru/index.php/MD/issue/viewIssue/55/54.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Martin J.A., Hamilton B.E., Osterman M.J.K. Three decades of twin births in the United States, 1980–2009. NCHS Data Brief. 2012;(80):1–8. Avaiable at: https://www.ncbi.nlm.nih.gov/pubmed/22617378#.</mixed-citation><mixed-citation xml:lang="en">Martin J.A., Hamilton B.E., Osterman M.J.K. Three decades of twin births in the United States, 1980–2009. NCHS Data Brief. 2012;(80):1–8. Avaiable at: https://www.ncbi.nlm.nih.gov/pubmed/22617378#.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Barinov S.V., Artymuk N.V., Novikova O.N., Shamina I.V., Tirskaya Y.I., Belinina A.A. et al. Analysis of risk factors and predictors of pregnancy loss and strategies for the management of cervical insufficiency in pregnant women at a high risk of preterm birth. J Matern Fetal Neonatal Med. 2019;2019:1–9. doi: 10.1080/14767058.2019.1656195.</mixed-citation><mixed-citation xml:lang="en">Barinov S.V., Artymuk N.V., Novikova O.N., Shamina I.V., Tirskaya Y.I., Belinina A.A. et al. Analysis of risk factors and predictors of pregnancy loss and strategies for the management of cervical insufficiency in pregnant women at a high risk of preterm birth. J Matern Fetal Neonatal Med. 2019;2019:1–9. doi: 10.1080/14767058.2019.1656195.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Баринов С.В., Артымук Н.В., Новикова О.Н., Шамина И.В., Тирская Ю.И., Белинина А.А. и др. Опыт ведения беременных группы высокого риска по преждевременным родам с применением акушерского куполообразного пессария и серкляжа. Акушерство и гинекология. 2019;(1):140–148. doi: 10.18565/aig.2019.1.140-148.</mixed-citation><mixed-citation xml:lang="en">Barinov S.V., Artymuk N.V., Novikova O.N., Shamina I.V., Tirskaya Yu.I., Belinina A.A. et al. Experience in managing pregnant women at high risk for preterm birth, by using a dome-shaped obstetric pessary and cerclage. Akusherstvo i Ginekologiya = Obstetrics and Gynecology. 2019;(1):140–148. (In Russ.) doi: 10.18565/aig.2019.1.140-148.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Lockwood C.J. Pathogenesis of spontaneous preterm birth. Literature review current through: Aug 2019. Avaiable at: https://www.uptodate.com/contents/pathogenesis-of-spontaneous-preterm-birth/print.</mixed-citation><mixed-citation xml:lang="en">Lockwood C.J. Pathogenesis of spontaneous preterm birth. Literature review current through: Aug 2019. Avaiable at: https://www.uptodate.com/contents/pathogenesis-of-spontaneous-preterm-birth/print.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">McClure E.M., Saleem S., Goudar S.S., Moore J.L., Garces A., Esamai F. et al. Stillbirth rates in low-middle income countries 2010–2013: a populationbased, multi-country study from the Global Network. Reprod Health. 2015;90(12):1379–1385. doi: 10.1186%2F1742-4755-12-S2-S7.</mixed-citation><mixed-citation xml:lang="en">McClure E.M., Saleem S., Goudar S.S., Moore J.L., Garces A., Esamai F. et al. Stillbirth rates in low-middle income countries 2010–2013: a populationbased, multi-country study from the Global Network. Reprod Health. 2015;90(12):1379–1385. doi: 10.1186%2F1742-4755-12-S2-S7.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Smith K.L., Manktelow N.B., Draper E.S., Boyle E.M., Johnson S.J., Field D.J. Paediatrics Research Trends in the incidence and mortality of multiple births by socioeconomic deprivation and maternal age in England: population-based cohort study. BMG. 2014;4(4):16–32. doi: 10.1136%2Fbmjopen-2013-004514.</mixed-citation><mixed-citation xml:lang="en">Smith K.L., Manktelow N.B., Draper E.S., Boyle E.M., Johnson S.J., Field D.J. Paediatrics Research Trends in the incidence and mortality of multiple births by socioeconomic deprivation and maternal age in England: populationbased cohort study. BMG. 2014;4(4):16–32. doi: 10.1136%2Fbmjopen-2013-004514.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Dang V.Q., Nguyen L.K., Pham T.D., He Y.T.N., Vu K.N., Phan M.T.N. et al. Pessary Compared With Vaginal Progesterone for the Prevention of Preterm Birth in Women With Twin Pregnancies and Cervical Length Less Than 38 mm: A Randomized Controlled Trial. Obstet Gynecol. 2019;133(3):459–467. doi: 10.1097/AOG.0000000000003136.</mixed-citation><mixed-citation xml:lang="en">Dang V.Q., Nguyen L.K., Pham T.D., He Y.T.N., Vu K.N., Phan M.T.N. et al. Pessary Compared With Vaginal Progesterone for the Prevention of Preterm Birth in Women With Twin Pregnancies and Cervical Length Less Than 38 mm: A Randomized Controlled Trial. Obstet Gynecol. 2019;133(3):459–467. doi: 10.1097/AOG.0000000000003136.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">McLennan A.S., Gyamfi-Bannerman C., Ananth C.V., Wright J.D., Siddiq Z., D’Alton M.E., Friedman A.M. The Role of Maternal Age in Twin Pregnancy Outcomes. Am J Obstet Gynecol. 2017;217(1):80.e1–80.e8. doi: 10.1016/j.ajog.2017.03.002.</mixed-citation><mixed-citation xml:lang="en">McLennan A.S., Gyamfi-Bannerman C., Ananth C.V., Wright J.D., Siddiq Z., D’Alton M.E., Friedman A.M. The Role of Maternal Age in Twin Pregnancy Outcomes. Am J Obstet Gynecol. 2017;217(1):80.e1–80.e8. doi: 10.1016/j.ajog.2017.03.002.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Goya M., de la Calle M., Pratcorona L., Merced C., Rodo C., Serrano A. et al. Cervical pessary to prevent preterm birth in women with twin gestation and sonographic short cervix: a multicenter randomized controlled trial (PECEP-Twins). Am J Obstet Gynecol. 2016;214(2):145–152. doi: 10.1016/j.ajog.2015.11.012.</mixed-citation><mixed-citation xml:lang="en">Goya M., de la Calle M., Pratcorona L., Merced C., Rodo C., Serrano A. et al. Cervical pessary to prevent preterm birth in women with twin gestation and sonographic short cervix: a multicenter randomized controlled trial (PECEP-Twins). Am J Obstet Gynecol. 2016;214(2):145–152. doi: 10.1016/j.ajog.2015.11.012.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
